/* ============================================
   Grupo Empresarial Soluciones Cuatro en Uno SAS
   Paleta: Rojo de marca + Carbon
   ============================================ */
:root{
  --rojo:#d81828; --rojo-osc:#a5121f; --rojo-bri:#f82830;
  --carbon:#16243a; --carbon2:#21324f; --gris:#5c636c;
  --gris-claro:#eef1f4; --linea:#e2e6ea;
  --texto:#1b1f24; --blanco:#fff;
  --sombra:0 10px 34px rgba(20,24,30,.12); --sombra-sm:0 4px 16px rgba(20,24,30,.08);
  --rad:8px; --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,Arial,sans-serif;color:var(--texto);background:var(--blanco);line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{line-height:1.18;color:var(--carbon);font-weight:800;letter-spacing:-.01em}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 28px}
svg{display:block}

/* Eyebrow */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:.78rem;font-weight:800;letter-spacing:2.5px;text-transform:uppercase;color:var(--rojo)}
.eyebrow::before{content:"";width:26px;height:3px;background:var(--rojo);display:inline-block}

/* Barra superior */
.topbar{background:var(--carbon);color:#c8ced6;font-size:.82rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:8px 28px}
.topbar a{color:#e6eaef}
.topbar .tb-r{display:flex;gap:20px;flex-wrap:wrap}
.topbar b{color:#fff}

/* Nav */
.nav{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--linea)}
.nav-inner{max-width:var(--max);margin:0 auto;padding:12px 28px;display:flex;align-items:center;justify-content:space-between}
.brand img{height:56px;width:auto}
.nav-links{display:flex;gap:4px;align-items:center;list-style:none}
.nav-links a{padding:10px 16px;font-weight:600;font-size:.95rem;color:var(--carbon);border-radius:6px;transition:.18s}
.nav-links a:hover{background:var(--gris-claro)}
.nav-links a.activo{color:var(--rojo)}
.nav-links a.cta{background:var(--rojo);color:#fff;padding:11px 22px}
.nav-links a.cta:hover{background:var(--rojo-osc)}
.menu-btn{display:none;background:none;border:none;font-size:1.6rem;color:var(--carbon);cursor:pointer}

/* Botones */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 28px;border-radius:6px;font-weight:700;font-size:1rem;cursor:pointer;border:none;transition:.18s}
.btn svg{width:19px;height:19px}
.btn-rojo{background:var(--rojo);color:#fff}
.btn-rojo:hover{background:var(--rojo-osc)}
.btn-linea{background:transparent;color:var(--carbon);border:2px solid var(--carbon)}
.btn-linea:hover{background:var(--carbon);color:#fff}
.btn-blanco{background:#fff;color:var(--carbon)}
.btn-blanco:hover{background:var(--gris-claro)}

/* Hero dividido */
.hero{background:var(--gris-claro);border-bottom:1px solid var(--linea);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;min-height:520px}
.hero-text{padding:70px 0}
.hero-text h1{font-size:clamp(2.1rem,4.4vw,3.3rem);color:var(--carbon)}
.hero-text h1 .ac{color:var(--rojo)}
.hero-text p{font-size:1.18rem;color:var(--gris);margin:20px 0 30px;max-width:560px}
.hero-acc{display:flex;gap:14px;flex-wrap:wrap}
.hero-media{position:relative;align-self:stretch;min-height:420px;background:var(--carbon) center/cover no-repeat}
.hero-media::after{content:"";position:absolute;left:-22px;bottom:-22px;width:130px;height:130px;background:var(--rojo);z-index:0}
.hero-media .ph{position:absolute;inset:0;background:linear-gradient(135deg,var(--carbon),#333a44);display:grid;place-items:center;color:#5f6b7a;font-weight:700;letter-spacing:1px}

/* Banda de cifras */
.cifras{background:var(--carbon);color:#fff}
.cifras .wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:46px 28px}
.cifra{text-align:center;border-left:3px solid var(--rojo);padding-left:22px}
.cifra .n{font-size:2.6rem;font-weight:800;color:#fff;line-height:1}
.cifra .n span{color:var(--rojo)}
.cifra .t{color:#aeb6c0;margin-top:6px;font-size:.98rem}

/* Secciones */
.sec{padding:88px 0}
.sec-gris{background:var(--gris-claro)}
.sec-carbon{background:var(--carbon);color:#fff}
.sec-carbon h2,.sec-carbon h3{color:#fff}
.sec-head{max-width:720px;margin-bottom:50px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head h2{font-size:clamp(1.8rem,3.6vw,2.5rem);margin:14px 0 12px}
.sec-head p{color:var(--gris);font-size:1.08rem}
.sec-carbon .sec-head p{color:#aeb6c0}

/* Grid tarjetas (resumen) */
.cols{display:grid;gap:22px}
.c3{grid-template-columns:repeat(3,1fr)}
.c2{grid-template-columns:repeat(2,1fr)}
.c4{grid-template-columns:repeat(4,1fr)}
.tarjeta{background:#fff;border:1px solid var(--linea);border-radius:var(--rad);padding:30px;transition:.2s}
.tarjeta:hover{transform:translateY(-4px);box-shadow:var(--sombra);border-color:transparent}
.tarjeta .ic{width:54px;height:54px;border-radius:8px;background:rgba(216,24,40,.1);color:var(--rojo);display:grid;place-items:center;margin-bottom:16px}
.tarjeta .ic svg{width:26px;height:26px}
.tarjeta h3{font-size:1.18rem;margin-bottom:9px}
.tarjeta p{color:var(--gris);font-size:.96rem}
.sec-carbon .tarjeta{background:var(--carbon2);border-color:#3a414b}
.sec-carbon .tarjeta p{color:#aeb6c0}

/* Servicios en filas alternadas */
.fila{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:64px}
.fila:last-child{margin-bottom:0}
.fila.inv .fila-media{order:2}
.fila-media{position:relative;aspect-ratio:4/3;border-radius:var(--rad);overflow:hidden;background:var(--carbon) center/cover no-repeat;box-shadow:var(--sombra-sm)}
.fila-media .ph{position:absolute;inset:0;background:linear-gradient(135deg,var(--carbon),#343b45);display:grid;place-items:center;color:#5f6b7a;font-weight:700}
.fila-media .num{position:absolute;left:0;top:0;background:var(--rojo);color:#fff;font-weight:800;font-size:1.1rem;padding:10px 16px;z-index:2}
.fila-text .eyebrow{margin-bottom:12px}
.fila-text h3{font-size:1.6rem;margin-bottom:12px}
.fila-text p{color:var(--gris);margin-bottom:14px}
.lista{list-style:none;display:grid;gap:10px}
.lista li{position:relative;padding-left:30px;color:var(--texto)}
.lista li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border:3px solid var(--rojo);border-radius:50%}

/* Timeline historia */
.timeline{position:relative;max-width:760px;margin:0 auto;padding-left:34px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:3px;background:var(--linea)}
.hito{position:relative;padding-bottom:34px}
.hito:last-child{padding-bottom:0}
.hito::before{content:"";position:absolute;left:-34px;top:3px;width:17px;height:17px;border-radius:50%;background:var(--rojo);box-shadow:0 0 0 5px rgba(216,24,40,.15)}
.hito h3{font-size:1.2rem;margin-bottom:5px}
.hito p{color:var(--gris)}

/* Promesa de valor */
.promesa{background:var(--carbon);color:#fff;border-radius:var(--rad);padding:60px;text-align:center;position:relative;overflow:hidden}
.promesa::before{content:"";position:absolute;left:0;top:0;width:100%;height:5px;background:var(--rojo)}
.promesa .q{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:800;max-width:760px;margin:0 auto 16px}
.promesa .q span{color:var(--rojo)}
.promesa p{color:#aeb6c0;max-width:640px;margin:0 auto}

/* Formulario */
.form-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:start}
.form-card{background:#fff;border:1px solid var(--linea);border-radius:var(--rad);padding:38px}
.campo{margin-bottom:18px}
.campo label{display:block;font-weight:700;margin-bottom:7px;font-size:.9rem;color:var(--carbon)}
.campo input,.campo textarea,.campo select{width:100%;padding:13px 15px;border:1.5px solid var(--linea);border-radius:6px;font-size:1rem;font-family:inherit;background:#fbfcfd}
.campo input:focus,.campo textarea:focus,.campo select:focus{outline:none;border-color:var(--rojo);background:#fff}
.campo textarea{resize:vertical;min-height:120px}
.info-list{display:grid;gap:14px}
.info-it{display:flex;gap:15px;align-items:flex-start;background:#fff;border:1px solid var(--linea);border-radius:8px;padding:18px}
.info-it .ic{flex-shrink:0;width:44px;height:44px;border-radius:8px;background:rgba(216,24,40,.1);color:var(--rojo);display:grid;place-items:center}
.info-it .ic svg{width:21px;height:21px}
.info-it strong{display:block;color:var(--carbon);margin-bottom:2px}
.info-it span,.info-it a{color:var(--gris);font-size:.95rem}

/* WhatsApp flotante */
.wa{position:fixed;bottom:24px;right:24px;z-index:200;width:60px;height:60px;border-radius:50%;background:#25d366;color:#fff;display:grid;place-items:center;box-shadow:0 6px 20px rgba(37,211,102,.45);transition:.2s}
.wa:hover{transform:scale(1.08)}
.wa svg{width:30px;height:30px}

/* Footer */
.footer{background:var(--carbon);color:#aeb6c0;padding:54px 0 24px;border-top:5px solid var(--rojo)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px;margin-bottom:34px}
.footer h4{color:#fff;margin-bottom:15px;font-size:1.02rem}
.footer a{color:#aeb6c0;transition:.18s}
.footer a:hover{color:#fff}
.footer ul{list-style:none;display:grid;gap:9px}
.footer-logo{background:#fff;display:inline-block;padding:12px 16px;border-radius:8px;margin-bottom:16px}
.footer-logo img{height:54px}
.footer-bottom{border-top:1px solid #353b44;padding-top:20px;text-align:center;font-size:.86rem;color:#7e8794}

/* Responsivo */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-text{padding:54px 0 0}
  .hero-media{min-height:300px}
  .fila{grid-template-columns:1fr;gap:24px;margin-bottom:48px}
  .fila.inv .fila-media{order:0}
  .form-grid{grid-template-columns:1fr}
  .c3,.c4{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px;gap:4px;box-shadow:var(--sombra);display:none;border-bottom:1px solid var(--linea)}
  .nav-links.open{display:flex}
  .menu-btn{display:block}
  .topbar{display:none}
}
@media(max-width:560px){
  .cifras .wrap,.c2,.c3,.c4,.footer-grid{grid-template-columns:1fr}
  .promesa{padding:40px 24px}
  .sec{padding:62px 0}
}